{
  "bibcode": "2017GCN.20794....1S",
  "body": "D. Svinkin, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik,\nM. Ulanov, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline,\non behalf of the Konus-Wind team, report:\n\nKonus-Wind (KW) was observing the whole sky at the times of the LIGO\nevents G268556, G270580, and G274296 (hereafter T0; LIGO/VIRGO \nCollaboration GCN Circ. 20364, 20486, and 20689, respectively).\nA waiting mode data gap (~100 s in duration) occurred at the time of the \nLIGO event G275404 (LIGO/VIRGO Collaboration GCN Circ. 20738), so it was \nexcluded from the analysis.\n\nWe found no significant (> 5 sigma) detection on temporal scales from \n2.944 s to 100 s using waiting mode data from both KW detectors S1 and \nS2 within \u001b+/- 100 s from each of the LIGO triggers.\n\nThe table below contains, for each of the triggers, estimates for  upper \nlimits (90% conf.) on the fluence (S) for a burst lasting less than \n2.944 s and having a typical KW short GRB spectrum (an exponentially cut \noff power law with alpha\u000b=-0.5 and Ep=500 keV); and on the peak flux \n(Fpeak; on the 2.944 s scale) for a typical long GRB spectrum (the Band \nfunction with alpha=-1, beta=-2.5, and Ep=300 keV), both in the 10 keV - \n10 MeV band.\n\n  UID             T0, UTC           S*    Fpeak**\nG274296 2017-02-17 06:05:53.050   9.6     3.2\nG270580 2017-01-20 12:30:59.350   9.9     3.1\nG268556 2017-01-04 10:11:58.599   9.2     3.3\n\n* in units of 10^-7 erg/cm2\n** in units of 10^-7 erg/cm2/s\n\nAll the quoted values are preliminary.",
  "circularId": 20794,
  "createdOn": 1488465779000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "LIGO/Virgo G268556, G270580, G274296, and G275404: Konus-Wind observations",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "LIGO/Virgo G268556"
}